A woman dressed as a devil was gunned down and her boyfriend critically wounded after returning from a Halloween bash early this morning in Brooklyn.

Police found the scary scene inside of a Sheepshead/Nostrand Houses building lobby around 6 a.m., where the costumed Ciera Glenn, 25, was lying in a pool of blood with fatal wounds to her stomach and leg, sources said.

Her boyfriend Tyree Shelton, 27, who resides in the development was blasted once in the face, sources said. It is believed he drove himself to Coney Island Hospital, sources added. He is listed in critical condition, .

Records show that Shelton served a year-and-a-half in state prison on gun posession charges.

No arrests have been made, police said.

A neighbor stumbled upon the grisly scene when he entered the lobby of 2336 Batchelder St., and called authorities when he saw the costumed young woman surrounded by blood near the mailboxes.

“They must have been coming back from a Halloween party,” said Luke Kopelakis, 71, who made the gruesome find.

The resident saw six shells on the floor and looked in horror at a blood-spattered elevator.